Just wanted to update this while I remember, for the people next year who might be wondering how the letter is worded.
This is what we received from KEVIGS (in a white windowed envelope):
Dear.....Candidate Name: .......
I am pleased to tell you that in the recent entrance testing for the Lincolnshire Consortium of Grammar Schools Name
has passed the entrance test. At the time of writing this letter 78 children living in catchment and 61 from out of cachment reached the required standard for entry to King Edward VI Grammar School - this means that 139 children have passed the test for 120 available places.
It then goes on to explain the admissions policy.
DD also received a certificate in a separate brown envelope addressed to her.
It's my understanding that those who don't qualify will receive their standardised score in their letter.
Hope this helps the future peeps on the forum